package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * 套餐业务实现
 */
@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

 @Autowired
    private SetmealMapper setmealMapper;
 @Autowired
 private SetmealDishMapper setmealDishMapper;
 @Autowired
private DishMapper dishMapper;
    //new 菜品类
    //用dto给他赋值
    //DISHMapper.insert
    //获取口味
    //DishFlavorMapper.insert

    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {
        //new 菜品类
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //向setmeal表中插入数据
        setmealMapper.insert(setmeal);
        //获取 生成的套餐id
         Long setmealId = setmeal.getId();

        final List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        //保存套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);


    }


    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        //获取num  paagesize
        final int pageNum = setmealPageQueryDTO.getPage();
        final int pageSize = setmealPageQueryDTO.getPageSize();
        //开启分页
        PageHelper.startPage(pageNum,pageSize);
        //调用mapper方法进行查询
        Page<SetmealVO> page= setmealMapper.pageQuery(setmealPageQueryDTO);
        //将返回对象封装
        return new PageResult(page.getTotal(),page.getResult());

    }

     @Transactional
    public void deleteBatch(List<Long> ids) {
       //遍历集合
         ids.forEach(id->{
             //调用mapper获取id套餐
               Setmeal setmeal= setmealMapper.getById(id);
               //判断套餐状态
             if (setmeal.getStatus()== StatusConstant.ENABLE){
                 //套餐起售中  不能删除
                 throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
             }
         });
         ids.forEach(setmealId->{
             //删除套餐中的数据
             setmealMapper.deleteById(setmealId);
             //删除套餐菜品关系表中的数据
             setmealDishMapper.deleteBySetmealId(setmealId);
         });
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    public SetmealVO getByIdWithDish(Long id) {
        //查询套餐
        //查询套餐菜品关联表
        SetmealVO setmealVO = setmealMapper.getByIdWithDish(id);
        //封装到setmealVO
        return setmealVO;
    }

    @Transactional
    public void update(SetmealDTO setmealDTO) {
        //将controller传来的对象中的值赋给新建的套餐表
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //1.修改套餐表
        setmealMapper.update(setmeal);
        //获取被修改的表 套餐ID
        final Long setmealId = setmealDTO.getId();
        //2.删除套餐和菜品的关联关系  操作setmeal_dish表，执行delete
        setmealDishMapper.deleteBySetmealId(setmealId);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //3、重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
        setmealDishMapper.insertBatch(setmealDishes);
    }


    /**
     * 套餐起售  停售
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        //起售套餐时 判断套餐内是否含停售菜品  有的话提醒
        if (status == StatusConstant.ENABLE){
           //调用mapper得到菜品集合
            List<Dish> dishList= dishMapper.getBySetmealId(id);
            //判断菜品是否为不为空 并且长度大于0
            if(dishList !=null&& dishList.size()>0){
                //遍历集合 并判断菜品状态
                dishList.forEach(dish->{
                    if (StatusConstant.DISABLE==dish.getStatus()){
                        //存在停售菜品 套餐无法起售
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }

        }
        Setmeal setmeal= Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }


    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }


    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}

